Honing spindle



A. F. WEDGE ET AL HQNING SPINDLE Filed Dec. 4, 1943 Patented Dec. 7, 1948 HONING SPINDLE Arthur F. Wedge, Hartford, and Homer Bidvwell, Manchester, Conn., assignors to Colts Manufacturing Company, a'corporatlon of Connecticut l Application December 4, 1343,

' t Claras. (C1. 51-1s4.s)

ing mandrels or spindles.

The invention is'partic'ularly applicabler though not restrictively, to a honing mandrel or spindle of the type utilized inconjunction witha grinding-.or honing machinesuch as illustrated `.and described in Patents Nos. 2,070,381 and 2,117,525, both in the name of Joseph Sunnen. f y One typeoi` standard or 'conventional-'honing spindle now used with the honing. n-iaclfiine'sV referred to comprises anv elongated longitudinally splined shank having, on yits .outer free end a diametrically enlarged portion: accommodating the honing member or grinding stone which pro'- jects radially from the spl-ine. .'Iheouter surface of said enlarged end opposite theV vradially projecting honing member or stone serves' asa bearing orbacking furthe Iattervwhenthe spindle is used to hone the inner surfaceiofa cylindrical. aperture in a workpiece. e

Means are provided inthe spindle and honing machine to cause the .honing 'member `to be expanded radially as said.' member Wears. Thelopposite surface referred to on the outer. end. of the spindle: also rubs against the inner vsurface of the aperture beingv lhonedV and the abrasive particles accumulating on the surface of the aperture as the stone Wears serve rtf1-"grind or wear away the surface of the enlarged outerend oi the spindle opposite the honing member. Ultimately,

and rather rapidly, theA portion of th-eenlarged;`

outer end of the spindle opposite the honing member becomes Worn down to Where it is merely a continuation of the main orintermediate portion of they spindleand nov longer gives' the proper backing to the honing member in the spindle'. Inasmuch as said enlarged outer end x of the spindle is integral with theshank to whichit is attached, when said enlarged l'outer end becomes worn'to the extent referredfto above, it is neces-.

sary to discard the spindle* and insert a .new oneA in the machine.

Particularly in `spindles used therein. Furthermore, in situations Vwhere the honing machines vare used Yconstantly during Aarev relatively` long in comparison to their diameter, it is neces- Serial No. 512,928

. `2 an eight hour day on a certain type of material, approximately four spindles will be Worn. each day to the extent they are no longer usable and discarding thereof is necesary.

From the foregoing, :it will be: seen that thev required discarding of four,v spindlesper eight hour day from each machine amounts to a considerable Waste of good qualityv tool steel, particularly whenk the fact is considered that the major portion` of the spindle is still in satisfactory conditionffor` continued use andthe only unusable part is the outer enlarged end which has been Worn to an` unusable condition. fv o It is therefore an object of the present invention to improve' the 'construction of the conventional or standard typev of spindles referred tol above to the extent that the enlarged outer end of the spindles is formed by adding a detachable` cylindrical sleeve to the outer end of a shank having a. uniform diameter except at its shank end, thethickness of the wall of said sleeve being ade quate to furnish the required enlargement neededA at the outer end of the spindle to provide a proper backing or bearingsurface for the honing member disposed in the spline of the spindle, whereby when said enlarged outer end formed by the sleeve is Worn to suchextent it is no longer usable, the Worn sleeve may be replaced by a new one and the continued use of the main portion of the shank is thus possible. v

It Yis another object of the invention to provide a number of` different embodiments or types -of disengageable connecting. means by 'which the renewable sleeves referred to above areoperatively secured to the youter or free end of the spindle.

It'is a still further object of the invention toa construct the connecting means compris-ing the last-mentioned object in such a Way that atleast several rembodiments ofL the connecting means.

will utilize 'constructions on the present standard type of spindles vvl'iereby previously discarded spindles may be inexpensively revised to include a sleeve construction comprising the present invention to thus result inv considerable saving in material formerly considered waste, 'notwithstand-v ing the fact that thev present invention is evenv more readily applicable to spindles being newlyA but it will be understood that the drawings are intended for illustrative purposes only and are not to be construed as defining or limiting the scope of the invention, the claims forming a part of this specification being relied upon for that purpose.

In the drawings, e I Fig. 1 is a fragmentary side elevation of sui'- cient details of a honing machine, including a standard or conventional honing spindle operatively positioned in a diagrammatically shown work piece, to illustrate the construction over which the present invention comprises an improvement. y i Y Fig. 2 is an enlarged end elevation of a standard honing spindle of the type illustrated in Fig. l, the end of said spindle being shown in a cylindrical aperture in a diagrammaticallyillustrated work piece, the spindle illustrated being in new or originally manufactured condition.

Fig. 3 is a view similar to Fig. 2 but showing the outer end of the spindle after it has become Worn to the extent that it is no longer usable.

Fig, 4 illustrates a fragmentary side elevation of the outer end of a spindle made in accordance with one embodiment of the present invention. Fig. 5 is a side elevation of a renewable sleeve comprising part of said embodiment of the invention and adapted to be detachably secured to the end of the spindle shank shown in Fig. 4, Fig. 6 is a fragmentary side elevational view showing the sleeve illustrated in Fig. 5 assembled in operative position on the endof the spindle shown in Fig. 4.

Fig. '7 is a sectional end elevation on the line I--l of Fig. 6 and illustrates one embodiment of connecting or locking means for detachably securing said spindle and sleeve in assembled relationship. f

Fig. 8 is a side elevation of a sleeve similar to that in Fig. 5 but embodying another form of means for securing the `sleeve to the' outer end of a spindle such as shown in Fig. 4.

Fig. 9 is a fragmentary side elevation illustrating the sleeve in Fig. 8 assembled on the outer end of a spindle vsuch as shown in Fig. 4.

Fig. 10 is a sectional end elevation on the line ID--IIJ of Fig. 9 and illustrates another embodiment of connecting or locking means for detachably securing the spindle and sleeve in assembled relationship.

Fig. 11 is a sectional view similar to Fig. 10

, cylindrical socket I6 adapted to receive the shank I8 of a honing spindle 20. Said honing spindle Zilis of the standard or conventional type now 'used with the type of honing machines referred to in the foregoing.

As clearly illustrated in Fig. l, the shank I8 of the spindle is considerably enlarged in diameter over that of the main portion of the but shows the relative position of the sleeve and outer end of the spindle at the time the sleeve is being telescopically assembled on the spindle and before the sleeve assumes its operative position on the spindle as illustrated in Fig. 10.

Fig. 12 is a fragmentary side elevation similar to Fig. 4 but illustrating the outer end of a spindle including another embodiment of locking means comprising the present invention.

Fig. 13 is a side elevationof a sleeve to be used with the spindle shown in Fig. 12.

Fig. 14 is a fragmentary side elevation showing the sleeve shown in Fig. 13 assembled in operative position on the end of the spindle shown' in Fig. 12.

Fig. 15 is a sectional end elevation on the line I5-|5 of Fig. 14 and illustrates thedetails of the means illustrated in Figs. 13 and 14 for securing the sleeve and spindle together in operative relationship.

Referring to the drawings, Fig. 1 shows a fragmentary portion `of a honing machine utilizing Va spindle to which the present invention` pervmounted in and rotatable with shaft l2.

spindle.y Further, the outer free end 22 of the spindle is enlarged diametrieally as is clearly evident in said figure. The entire spindle including shank I8 and enlarged portion 22 is conventionally formed from a single piece of stock, the main or intermediate portion ofthe spindle, as well as the diametrically larger outer end being out down to produce the shape shown in Fig. 1. v v

The spindle 20 is provided longitudinally from end to end with a spline 24, said spline being of sufficient width to receive therein, adjacent the outer end of the spindle, a honing block or mem' ber 26 which usually comprises a metallic base 28 to which is suitably cemented a grinding or honing stone 30.

The honing member 26 is adapted to be radially expanded with respect to the outer end of the spindle by means of a flat bar 32 connected at one end, in the spline in the shank of the spindle, with a longitudinally adjustable member 34 Member 34 is movable in opposite directions, as indicated by the arrows thereon, and is normally biased toward the left as viewed in Fig. 1, by helical spring 36.

The opposite or outer end of bar 32 is provided with a pair of cams 38 and 40, the cam faces of which are parallel but longitudinally spaced so as to be coengageable with a `pair of suitable spaced and parallel cam surfacesl 42 land 4d formed in a recess on one side of the metallic portion 28 of honing member 2li.V As bar 32 is moved outward toward theend of spindle 2li, the coengaging cam surfaces thereon .andon the honing member will cause the latter to be eX- panded radially outward. `Such movement is insured due to the fact that the honing member 26 is prevented 'from moving longitudinally with respect to the spindle 20 by means of a pin 46 which projects from one side of the. honing member and. is accommodated in a vertically extending recess or slot 48 in the spindle which recess extends laterally from the spline 24. Said slot permits movement of the honing member 26 in a radial direction only with respect to the spindle.

The honingmachine described in the patents referred to in the foregoing is provided with means whereby the operator may readily move member 34 and bar.32 in opposite directions whilev the spindle 20 is rotating in a work piece 5i] indicated in dotted lines in Figs. l through 3 for purposes of honing the surface of a cylindrical Vaperture 52 in said work piece.V An experienced honing member k26 issumciently expanded to perform the honing operationin a satisfactory ,manner. If said honing member is notsuiiciently eX- panded, the machine is provided with means whereby member 34 and bar 32 maybe moved axially outward toward the end of the spindle to expand the honing member the proper amount.

When it is desired to remove the honing tool from the work piece, the control means on the machine for member 34'and bar 32 arereleased, whereby spring 36 automatically l'etractsfbar 32 and permits honing member` 26, fthrougnengagef ment with the surface of the aperture zjinthe workpiece, to be moved radially into the spliney 24 suiiiciently to permit ready withdrawal of the outer end of the spindle from the aperture 52.

The portion of, the enlarged end` 22 on .the spindle opposite the honing member `26 provides a .bearing Vor backing surface to maintain thev honing member in honing engagement with'v the a surface of an aperture such as 52 in a work piece. As has Ibeen briefly mentioned above, however, the abrasive particles wearing away from the stone 36 of the honing member will remain in the `aperture and will serve in a detrimental capacityfto wear away said opposite por tion of the enlarged end 22 of the spindle. When the spindle is in new and unused condition,the

enlarged outer end thereof will appear in endV view as shown in Fig. 2.- However, after ksaid opposite portion ofthe enlarged outer end has become worn', the surface of said portiony will be substantially in alignment with the intermediate portion of shank 20 so that the end of thevspindl'e will resemble the view shown in'Fig. 3.

Usually, when a spindle becomes -wornto the extent illustrated in Fig. 3, and particularly after the stone of the honing member becomes worn more or less tothe extent shown in said'gure, the'lspindle and honing member are no longer usable forpurposes of honingl the surface of a cylindrical aperture having a diameter ofthe size which said spindle and stone were intended to hone when in new condition. Whenv thusworn,

the stone and' spindle must both be discarded andv The present invention contemplates` overcoming the waste comprising discarding the entire spindle' when the outer end thereof becomes too worn for further use vby forming the outer end of the spindle 20 with an outer diameter uniformwith;

the major portion of the spindle such as illustrated in Figs. 4 and 6. The enlargement of the` f'- outer end `of the spindle is effected by providinga sleeve 54 having an inner diameter substantially equal to the outer diameterof the end of the spindleand an outer diameter adequate to produce an enlargement on the endl of the spindle of proper dimensions to provide the required backing or bearing surface for the honing member when disposed 5in the spline in the spindle.,

Such a sleeve is shown in Fig. 5 and is substan tially as long as the length ofthe enlarged por--r 6 tionZZ on the outer end of a conventional spindle. Sleeve 54 is thus'adapted to telescopically engage the outer end of 'spindle 20 when formed as described above, and said sleeve is provided withan inward projecting lugfor pin. 56 for purposes of being disposed in the slot 48 normally formed in the end of a conventional spindle to preventrelative longitudinal movement of the honing member and also formed in the modified spindle for the same purpose; The utilization of such a'slot is-,advantageous to not only detachaloly lockk the sleeve 54 .against movement with respect to the spindle 20 in a longitudinal direction but, such utilization of the conventional 'slot 48 `to Comprise part of said locking means enables the sall y to that Vof )the intermediate portionof the spindle.l

Sleeve 54' is also provided witha longitudinally extending slot 58 adapted to be aligned with spline 24 to accommodate and permit radial projection therefrom of .a 'honing member 26. Pin v56 is preferably disposed `longitudinally vofthe sleeve in such a position that, when disposed in slot 48,' the outer end of the sleeve is substantially with the outer end of lthespindle.

Sleeve. 54 is also providedwith a transverseslot 6D extending outward from the longitudinalfslot 58 suiciently far to permit passageftherethrough of pinf46 on the honing member when said honing member is being mounted in thespli'ne of the spindle. Thus, pin 56 on the sleeve'andftran's'- Y verse `slot ll'therein are in transverse alignment ywithrespec't to said sleeve. Furthermore, pini is mounted on said sleeve in such position that itr will lbe disposed in the lowermost portion `ofslot 48when'assembled in operative position as shown in Fig. 7, wherebythere will be no interference between pin 46 on the honing member and pin 56V on the sleeve when the honing member is assembled in the spindle. i

When the sleeve andspindle are assembled as illustrated in Figs. 6 and 7, it will 'thus'be seen that honing member 26 when disposed in the aligned .slot and spline therein will prevent "relative rotational movement between sleeve 54 and spindlez2. Thus, thehoning member and pin 56 ony the sleeve when Vdisposed in slot 48'in the spindle serve to maintain the sleeve operativelyv assembled with the outer end of the spindle.

Fig. Sshows another embodiment of the invention similar to that shownin Figs. 4 through 7 but in which thel sleeve 54 is provided with a transverse slot 62 positioned similarly to slot 60' of .the previously described embodiment but enf tending a greater distance transversely from lon gitudinal slot 58, slot 62'being provided at its closed.v end with an inturned tongue 64 which" serves a function similar to pin 56 in said pre-vil ouslyfdescribed embodiment. Tongue or earr 64 extendsV inward substantially the same distanceI as pin l56. Otherwise, the latter embodiment of thev invention is similar both kphysically and in:

function to the previously'describedl embodiment. Thesleeves 54 comprising the' two embodiments of the inventionV described above are assembledy on the. outer end of spindles 2U by telescopically sliding said sleeves part'way on said spindlesl and.

ment with spline 24, as shown in Fig. Al1. ,Then

thasleeves are moved longitudinally onto the spindlesuntil said pin 56;orear;64' is in ,transej flush verse alignment with slots 48 in said spindles. The sleeves are then rotated in the direction of the arrow shown in Fig. 11 until either the pin 56 or ear 64 is disposed substantially against the closed end of slot 48. Longitudinal slots 58 in the sleeves will then be in alignment with splines 20 for purposes of receiving the honing members.

The sleeves may be disassembled from the spindles, such as when the former have become worn, by first removing the honing members and then rotating the sleeve reversely to the arrow shown in Fig. 11 until the pins or ears are disposed in the splines, following which the sleeves are moved longitudinally outward from the free ends of the spindles;

A still further embodiment of the invention is illustrated in Figs. 12 through 15 in which the outer end of the spindle 20 has the same diameter as the main portion of the spindle and said end of the spindle also has the conventional transverse slot 48 therein which receives pin 46 on the honing member. However, said embodiment includes different locking means for securing the sleeve to the spindle, said locking means comprising a relatively wide slot or groove 66 extending transversely to the spline 24 and inward from the outer surface of the spindle adjacent said spline. Said groove is located in the spindle further inward than slot 48 and is positioned 11o receive an inturned ear or tongue 68 provided on a sleeve which is otherwise similar in dimensions to sleeve 54 shown in the other figures of the drawings.

Ear 68 is formed adjacent one end of the sleeve l0, said end being opposite to that adjacent which slot 60 is formed for accommodating pin 46 of the honing member. It has been found that the ear 68 of 'the latter embodiment of the invention may be less expensively formed than the pin 56 or tongue 64 included in the previously described embodiments inasmuch as the formation of ear 68 requires only making a single transverse cut extending inward from one wall of longitudinal groove 58, following which the portion of` the sleeve which is to form the ear is bent inward as indicated in Figs. 13 through 15.

The sleeve comprising the latter embodiment of the invention is assembled and disassembled with respect to the spindle in the same manner as the sleeves comprising the other embodiments of' the invention.

It will thus be seen that the various embodiments of the present invention will permit the effecting of considerable economy in honing spindles of the type described since, when the present invention is utilized, the only worn items which need be discarded are the replaceable sleeves and thus considerable material and expense is saved in contrast to using the conventional spindles wherein the entire spindle had to be discarded when worn to the extent that it was no longer usable. Furthermore, the sleeves comprising the various embodiments of the present invention may be expeditiously attached to and removed from theouter ends of the spindles. In addition, the various constructions comprising the invention are rugged and durable and readily adaptable not only to spindles being newly manufactured but also to existing spindles by only slight modications thereof.

While the invention has been illustrated and described in its preferred embodiments and has included lcertain details, it should be understood that the invention is not to be limited to the prer` oise details herein illustrated and described since Cil the same may be carried out in other ways, fallf ing within the scope of the invention as claimed.

What we'claim is: i

1. In combination with a substantially cylindrical hning spindle longitudinally splined and provided in said spline withv a honing member adjustably projecting radially therefrom, a lon gitudinally slotted sleeve telescopically engaging said spindle and providing a work engaging surface opposed to said honing member, said slot in said sleeve being aligned with said spline whereby said honing member also projects through said slot, and disconnectible interengaging locking means respectively carried by said spindle and sleeve to prevent appreciable relative movement therebetween in a longitudinal direction.

2. In combination with a substantially cylindrical honing spindle having a longitudinally extending spline and provided in said spline with a honing member adjustably projecting radially therefrom, a longitudinally slotted sleeve telescopically engaging said spindle and providing a work engaging surface opposed to said honing member, said slot in said sleeve being aligned with said spline whereby said honing member also projects through said slot, and disconnectible locking means for said spindle and sleeve comprising an interengaging projection and recess provided one on the spindle and the other on the sleeve to prevent appreciable relative movement between said spindle and sleeve in a longitudinal direction, relative rotatable movement therebetween being prevented by said honing member when projecting radially from said spline and into said slot.

3. In combination with a substantially cylindrical honing spindle having a longitudinally extending spline and provided in said spline with a honing member adjustably projecting radially therefrom, a longitudinally slotted sleeve telescopically engaging said spindle and providing a work engaging surface opposed to said honing member, said slot in said sleeve being aligned with said spline whereby said honing member also projects through said slot, and disconnectible locking means for said spindle and sleeve comprising a projection on said sleeve adapted to be disposed in a recess provided in said spindle to prevent appreciable relative movement between said spindle and sleeve in a longitudinal direction, relative rotatable movement therebetween being prevented by said honing member when projecting radially from said spline and slot.

4. In combination with a substantially cylindrical honing spindle having a longitudinally extending spline and provided in said spline with a honing member adjustably projecting radially therefrom, a longitudinally slotted sleeve telescopically engaging said spindle and providing a work engaging surface opposed to said honing member, said slot in said sleeve being aligned with said spline whereby saidhoning member also projects through said slot, and disconnectible locking means for said spindle and sleeve corn-r prising a projection on said sleeve adapted to be disposed in a recess provided in said spindle and communicating with said spline, said locking means preventing appreciable relative movement between said spindle and sleeve in a longitudinal direction and relative rotatable movement therebetween being prevented by said honing member when projecting radially from said spline and slot.

5. A substantially cylindrical honing spindle having a longitudinally extendingspline and also having a transverse slot in one wall of said spline, and a honing member in said spline and adapted to be adjustably projected radially therefrom, said honing member having a pin projecting from one side and disposed in said slot to prevent rela,- tive longitudinal movement between said spindle and honing member, in combination with a longitudinally slotted sleeve telescopioally engaging said spindle and providing a work engaging sur'- face opposed to said honing member, said slot ,in said sleeve being aligned with said spline whereby said honing member also projects through said slot, and disconnectible locking means for said spindle and sleeve comprising a projection on said sleeve extending inward and adapted to be disposed in said slot in the spindle to prevent appreciable relative movement between said spindle and sleeve in a longitudinal direction, rrelative rotatable movement therebetween being prevented by said honing member when projecting radially from said spline and slot.

6. A substantially cylindrical honing spindle longitudinally splined and also having a transverse slot in one wall of said spline, and a honing member insaid spline and adapted to be adjust.- ably projected radially therefrom, said honing member having a pin projecting laterally from one side and disposed in said slot to prevent relative longitudinal movement between said spindle and honing member, in combination with a longitudinally slotted sleeve telescopioally engaging said spindle and providing a work engaging surface opposed to said honing member, said slot in said sleeve being aligned with said spline whereby said honing member also projects through said slot, and means disconnectibly locking said spindle and sleeve and comprising a pin projecting inward from said sleeve and adapted to be disposed in said slot in the spindle to prevent appreciable relative movement between said spindle and sleeve in a longitudinal direction, relative rotatable movement therebetween being prevented by said honing member when projecting radially from said spline and slot.

7. A substantially cylindrical honing spindle longitudinally splined and also having a transverse slot in one wall of said spline, and a honing member in said spline and adapted to be adjustably projected radially therefrom, said honing member having a pin projecting laterally from one side and disposed in said slot to prevent relative longitudinal movement between said spindle `and honing member, in combination with a longitudinally slotted sleeve telescopioally engaging said spindle and providing a work engaging surface opposed to said honing member, said slot in said sleeve being aligned with said spline whereby said honing member also projects through said Number slot, and means disconnectibly locking said spindle and sleeve and comprising an inturned ear projecting from said sleeve and into said slot in said spindle to prevent appreciable relative movement between said spindle and sleeve in a longitudinal direction, relative rotatable movement therebetween being prevented by said honlng member when projecting radially from said spline and slot.

8. A substantially cylindrical honing spindle longitudinally splined and also having a transverse slot in one wall of said spline and a recess extending transversely of the spline and inward from the outer surface of the spindle, and a honing member in said spline and adapted to be adjustably projected radially therefrom, said honing member having a pin projecting laterally from one side and disposed in said slot to prevent relative longitudinal movement between said spindle and honing member, in combination with a longitudinally slotted sleeve telescopioally engaging said spindle and providing a work engaging surface opposed to said honing member, said slot in said sleeve being aligned with said spline whereby said honing member also projects through said slot, and means disconnectibly locking said spindle and sleeve and comprising a projection on said sleeve adjacent the slot therein and extending into said recess in said spindle to prevent appreciable relative movement between said spindle and sleeve in a longitudinal direction, relative rotatable movement therebetween being prevented by said honing member when projecting radially from said spline and slot.

ARTHUR F. WEDGE. HOMER T. BIDWELL.

REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS FOREIGN PATENTS Country Date Australia Feb, 1, 1939 Number 

